JP3404981B2 - Gas heating device - Google Patents
Gas heating deviceInfo
- Publication number
- JP3404981B2 JP3404981B2 JP09685795A JP9685795A JP3404981B2 JP 3404981 B2 JP3404981 B2 JP 3404981B2 JP 09685795 A JP09685795 A JP 09685795A JP 9685795 A JP9685795 A JP 9685795A JP 3404981 B2 JP3404981 B2 JP 3404981B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- pipe
- duct
- combustion
- heating device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D23/00—Assemblies of two or more burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/12—Radiant burners
- F23D14/16—Radiant burners using permeable blocks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
- F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/78—Cooling burner parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0488—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/10—Flame diffusing means
- F23D2203/105—Porous plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2212/00—Burner material specifications
- F23D2212/10—Burner material specifications ceramic
- F23D2212/103—Fibres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2212/00—Burner material specifications
- F23D2212/20—Burner material specifications metallic
- F23D2212/201—Fibres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/00008—Burner assemblies with diffusion and premix modes, i.e. dual mode burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/00014—Pilot burners specially adapted for ignition of main burners in furnaces or gas turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gas Burners (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、広く配管又はダクト中
を流れる被加熱気体をガスを燃料として加熱する気体加
熱装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to a gas heating device for heating a heated gas flowing in a pipe or a duct using the gas as a fuel.
【０００２】[0002]
【従来の技術】従来、この種の加熱装置として例えば、
実開平４−１２２９２２号公報に開示されている追い焚
きバーナ装置がある。これは、図４に示すように、燃料
ノズルを有するヘッダに、下流側になるにつれて拡開す
る保炎部材を接続した装置を、排ガス流路内に設けたも
のである。そして、燃料ノズルから噴出される燃料によ
り、保炎部材にあけられた穴から流入する排ガスを加熱
するようになっている。2. Description of the Related Art Conventionally, as a heating device of this type, for example,
There is a reburning burner device disclosed in Japanese Utility Model Laid-Open No. 4-122922. This is, as shown in FIG. 4, provided in the exhaust gas passage with a device in which a header having a fuel nozzle is connected to a flame holding member that expands toward the downstream side. Then, the fuel gas ejected from the fuel nozzle heats the exhaust gas flowing in through the hole formed in the flame holding member.
【０００３】[0003]
【発明が解決しようとする課題】上記加熱装置では、燃
料ノズル出口で発生する火炎は、投入ガス量に比例して
長くなるので、特にバーナ出力が大きい場合には、長い
火炎が発生する。また、拡散燃焼バーナでは燃料と空気
の混合のための空間が必要になる。これらの要因によ
り、被加熱気体を流すに必要な配管又はダクトの断面積
を大きく上回る断面積の配管又はダクトを設置しなけれ
ばならず、高出力の加熱装置の小型化が難しい。In the above heating device, the flame generated at the outlet of the fuel nozzle becomes longer in proportion to the amount of input gas. Therefore, when the burner output is large, a long flame is generated. Further, the diffusion combustion burner requires a space for mixing fuel and air. Due to these factors, it is necessary to install a pipe or a duct having a cross-sectional area that greatly exceeds the cross-sectional area of the pipe or duct required to flow the heated gas, and it is difficult to downsize the high-power heating device.
【０００４】[0004]
【課題を解決するための手段】本発明の空気加熱装置
は、被加熱気体の流れを供給する配管又はダクトと、前
記配管又はダクト内に配置された、繊維焼結マットによ
り配管又はダクト形状に合わせて筒状に形成され、内側
表面を燃焼面とする燃焼手段と、前記燃焼手段の上流側
端部において前記配管又はダクト内に配置され、被加熱
気体の流れに沿って下流に向けて燃料ガスを噴射する拡
散バーナとを備えることを特徴とするものである。The air heating device of the present invention comprises a pipe or a duct for supplying a flow of a heated gas , and
Combustion means, which is arranged in the pipe or duct and is formed into a tubular shape by a fiber sintered mat according to the shape of the pipe or duct, and has an inner surface as a combustion surface, and an upstream side of the combustion means.
Placed in the pipe or duct at the end and heated
Spreads fuel gas downstream along the gas flow
It is characterized in that it is provided with a burner .
【０００５】また、前記燃焼手段への被加熱気体流入側
である上流側端部に隣接する配管又はダクト内壁上に、
前記被加熱気体の流れが前記燃焼面に直接当たることを
妨げる風よけ部材を設けたことを特徴とするものであ
る。Further, on the inner wall of the pipe or duct adjacent to the upstream end which is the inflow side of the heated gas to the combustion means,
The windshield member is provided to prevent the flow of the heated gas from directly hitting the combustion surface.
【０００６】また、前記燃焼手段からの被加熱気体流出
側である下流側端部に隣接する配管又はダクト内に、こ
の配管又はダクトの通過断面積を部分的に減少させる絞
り部材を設けたことを特徴とするものである。Further, a throttle member for partially reducing the passage cross-sectional area of the pipe or duct is provided in the pipe or duct adjacent to the downstream end which is the heated gas outflow side from the combustion means. It is characterized by.
【０００７】また、前記燃焼手段の両端部の繊維焼結マ
ット取付け部材の外周面に沿って、予混合ガスを供給す
る経路を設けたことを特徴とするものである。また、前
記拡散バーナの周囲にリング状に配置された、被加熱気
体の流れを旋回流にして燃料ガスと混合するための旋回
羽根をさらに備えることを特徴とするものである。ま
た、前記旋回羽根の周囲にさらにリング状に配置され
た、被加熱気体の流れを旋回流にして繊維焼結マットか
らの燃焼ガスと混合するための旋回羽根をさらに備える
ことを特徴とするものである。Further, the present invention is characterized in that a path for supplying a premixed gas is provided along the outer peripheral surface of the fiber sintered mat attachment member at both ends of the combustion means. Also before
Air to be heated, which is arranged in a ring around the diffusion burner.
Swirling to make body flow swirl flow and mix with fuel gas
It is characterized by further comprising blades . Further, it is arranged in a ring shape around the swirl vane.
In addition, the flow of the heated gas is changed to a swirl flow so that the fiber mat
Further comprising swirl vanes for mixing with the combustion gases
It is characterized by that .
【０００８】[0008]
１．燃焼手段は、繊維焼結マットにより配管又はダクト
形状に合わせて筒状に形成され、内側表面が燃焼面にな
っている。この構成により次のような作用が生ずる。1. The combustion means is formed of a fiber sintered mat into a tubular shape according to the shape of the pipe or duct, and the inner surface is the combustion surface. With this configuration, the following actions occur.
【０００９】イ）燃料ガスと空気との予混合ガスを、金
属、セラミック等の繊維を層状に焼結した空隙率の高い
マットから噴出させ、マットの表面近傍で高出力の燃焼
を完結させることができる技術であり、他のタイプの予
混合または拡散燃焼を行うバーナに比べ著しく火炎長が
短く、ほとんど火炎が発生しない。(A) A premixed gas of fuel gas and air is ejected from a mat having a high porosity, which is obtained by sintering fibers of metal, ceramic, etc. in a layered manner, and high-power combustion is completed near the surface of the mat. It is a technology that can achieve this, and has a significantly shorter flame length than other types of burners that perform premixing or diffusion combustion, and almost no flame is generated.
【００１０】ロ）投入した燃料ガスのエネルギーは、燃
焼により生ずる燃焼ガスと被加熱気体との混合と、バー
ナ燃焼面での対流熱伝達により被加熱気体を加熱するの
に使われる。(B) The energy of the injected fuel gas is used to heat the gas to be heated by mixing the combustion gas generated by combustion with the gas to be heated and by convective heat transfer on the burner combustion surface.
【００１１】ハ）予混合ガスを燃焼させるため、バーナ
近傍に燃料ガスと酸素を混合させるために必要な空間が
必要ない。
ニ）燃焼面がマットなので、その形状を様々に変えるこ
とで、バーナ自身の形状を変えることができる。C) Since the premixed gas is burned, the space required for mixing the fuel gas and oxygen is not required near the burner. D) Since the burning surface is a mat, the shape of the burner itself can be changed by changing its shape.
【００１２】ホ）被加熱気体を加熱するのに必要な空間
が小さく、また形状を配管やダクトの形状に合わせて筒
状とし一体化できるので、バーナを小型化できる。
２．燃焼手段への被加熱気体流入側である上流側端部に
隣接する配管又はダクト内壁上に、被加熱気体の流れが
燃焼手段の燃焼面に直接当たることを妨げる風よけ部材
を設けた。(E) The space required for heating the gas to be heated is small, and the burner can be miniaturized because it can be formed into a cylindrical shape in accordance with the shape of the pipe or duct. 2. A windshield member was provided on the inner wall of the pipe or duct adjacent to the upstream end, which is the heated gas inflow side to the combustion means, to prevent the flow of the heated gas from directly impinging on the combustion surface of the combustion means.
【００１３】被加熱気体の流量または温度が上昇する
と、それが加熱装置を通る時の流速が上昇する。この流
速が上昇したときに、バーナの火炎が吹き飛ばされて、
失火しやすくなる。As the flow rate or temperature of the heated gas rises, the flow velocity of it as it passes through the heating device increases. When this flow velocity increased, the flame of the burner was blown away,
It is easy to misfire.
【００１４】繊維焼結マットにより配管やダクトの形状
に合わせて筒状に形成された燃焼手段の燃焼面である内
側表面に沿って被加熱気体が流れている。このため、被
加熱気体の下流側では、それより上流側の火炎による保
炎効果により失火しにくいが、一番上流側で一旦火炎が
剥離すると、火炎の剥離が下流へ伝わり全体の失火につ
ながる。The gas to be heated flows along the inner surface, which is the combustion surface of the combustion means, which is formed by the fiber sintered mat into a tubular shape according to the shape of the pipe or duct. Therefore, on the downstream side of the heated gas, it is difficult to misfire due to the flame holding effect of the flame on the upstream side, but once the flame separates at the most upstream side, the separation of the flame is transmitted to the downstream side, leading to overall misfire. .
【００１５】そこで、上記の風よけ部材を設けた。この
構成により次のような作用が生ずる。被加熱気体の上流
側に風よけ部材を設置すると、被加熱気体上流バーナ表
面での被加熱気体流速が緩まる。流速が遅くなると、そ
こでの火炎の剥離を防ぐことができる。Therefore, the windshield member is provided. With this configuration, the following actions occur. When the windshield member is installed on the upstream side of the heated gas, the heated gas flow velocity on the surface of the heated gas upstream burner is reduced. When the flow velocity is slow, the flaking of the flame can be prevented.
【００１６】被加熱気体の上流側で火炎の剥離を防ぐこ
とで、下流側は高流速の被加熱気体にさらされても、上
流側の火炎で保炎され、バーナ全体の失火を防ぐことが
てきる。By preventing the flaking of the flame on the upstream side of the heated gas, even if the downstream side is exposed to the heated gas at a high flow rate, the flame on the upstream side holds the flame, thereby preventing misfire of the entire burner. Come on.
【００１７】３．燃焼手段からの被加熱気体流出側であ
る下流側端部に隣接する配管又はダクト内に、この配管
又はダクトの通過断面積を部分的に減少させる絞り部材
を設けた。3. A throttle member for partially reducing the passage cross-sectional area of the pipe or duct is provided in the pipe or duct adjacent to the downstream end which is the heated gas outflow side from the combustion means.
【００１８】繊維焼結マットにより配管又はダクトの形
状に合わせて筒状に形成された燃焼手段での、燃焼ガス
はマット表面より垂直に配管又はダクトの軸に向かって
吹き出しているが、被加熱気体の流れによってマット表
面から配管又はダクト壁面に沿って運ばれてしまい、加
熱装置内では被加熱気体とほとんど混合しない。Combustion gas, which is formed by a fiber sintered mat in a tubular shape according to the shape of the pipe or duct, blows combustion gas vertically from the surface of the mat toward the axis of the pipe or duct. The gas flow carries the mat from the mat surface along the wall surface of the pipe or duct, and hardly mixes with the heated gas in the heating device.
【００１９】加熱装置内で燃焼ガスと被加熱気体の混合
が行われないと、温度の高いガスがマット表面から配管
又はダクト壁面に沿って流れてしまい、下流側の配管又
はダクトで乱流によって混合されるまで流れの温度は均
一にならない。If the combustion gas and the gas to be heated are not mixed in the heating device, the high-temperature gas flows from the mat surface along the wall surface of the pipe or duct, and the turbulent flow occurs in the pipe or duct on the downstream side. The temperature of the streams will not be uniform until mixed.
【００２０】加熱装置下流側の熱交換器などのプロセス
機器に均一な温度の気体を送るためには、混合を考慮し
て配管又はダクトの長さを長くしなければならない。ま
た、下流側の配管又はダクトも混合前の高温の燃焼ガス
に暴露されるので必要以上に設計温度が高くなってしま
う。In order to send the gas having a uniform temperature to the process equipment such as the heat exchanger on the downstream side of the heating device, the length of the pipe or duct must be increased in consideration of mixing. Further, the downstream piping or duct is also exposed to the high-temperature combustion gas before mixing, so that the design temperature becomes higher than necessary.
【００２１】そこで、加熱装置の下流側に絞り部材を設
けると、被加熱気体と燃焼ガスの混合が促進される。混
合が促進されると、混合に必要な下流側配管長さが短く
なるかまたは不要となる。また、混合すれば、被加熱気
体の温度が平均化し、下流側の配管又はダクト温度も下
げることができる。Therefore, if a throttle member is provided on the downstream side of the heating device, the mixing of the heated gas and the combustion gas is promoted. When mixing is promoted, the length of downstream piping required for mixing is reduced or even eliminated. Further, if mixed, the temperature of the heated gas is averaged and the temperature of the downstream pipe or duct can be lowered.
【００２２】４．燃焼手段の両端部の取付け部材の外周
面に沿って、予混合ガスを供給する経路を設けた。燃焼
手段である繊維焼結マットを固定している取付け部材
は、燃焼面に隣接しているために高温になりやすい。取
付け部材が高温になると、マットの非燃焼面も熱伝導で
高温になる。4. A path for supplying the premixed gas was provided along the outer peripheral surfaces of the attachment members at both ends of the combustion means. Since the attachment member that fixes the fiber sintered mat, which is the combustion means, is adjacent to the combustion surface, it tends to become hot. When the mounting member becomes hot, the non-combustion surface of the mat also becomes hot due to heat conduction.
【００２３】取付け部材やマットの非燃焼面が高温にな
り燃料の着火温度を越えると、これらの部材が燃料ガス
と接触するため、燃料ガスが発火し、燃料ガス供給側に
逆火の恐れがある。従って、取付け部の冷却が必要であ
る。When the non-combustion surface of the mounting member and the mat becomes hot and the ignition temperature of the fuel is exceeded, these members come into contact with the fuel gas, and the fuel gas ignites, which may cause a backfire on the fuel gas supply side. is there. Therefore, cooling of the mounting is required.
【００２４】この場合、外部より空気や水を導入して冷
却する方法もあるが、これらをユーティリティーとして
外部より供給する必要がある。また、冷却に使った空気
や水を系外に排出することでエネルギーの損失となる。In this case, there is also a method of cooling by introducing air or water from the outside, but these must be supplied from the outside as a utility. Also, the air and water used for cooling are discharged outside the system, resulting in energy loss.
【００２５】そこで、取付け部材の外周面に沿って、予
混合ガスを供給する経路を設け、取付け部を予混合ガス
により冷却するようにした。このため、冷却のための特
別なユーティリティーを用意する必要がなくなる。ま
た、この構造により燃料ガス側からみれば、燃料ガスが
予熱されたことになり、冷却によりエネルギーが系外に
捨てられることがなく、エネルギーの損失にならない。Therefore, a path for supplying the premixed gas is provided along the outer peripheral surface of the mounting member, and the mounting portion is cooled by the premixed gas. Therefore, it is not necessary to prepare a special utility for cooling. Further, as viewed from the fuel gas side, this structure means that the fuel gas has been preheated, so that the energy is not wasted to the outside of the system by cooling and no energy loss occurs.
【００２６】５．燃焼手段の上流側端部の内側に拡散バ
ーナを併設した。セラミック繊維を用いたマットにより
形成され燃焼手段での、最小出力と最大出力の比である
ターンダウン比は通常１：２程度であり、金属繊維を用
いた場合のターンダウン比は１：７程度である。被加熱
気体が十分な酸素を含んでいる場合、このバーナにター
ンダウン比が１：１０程度で、上記繊維マットバーナよ
り低出力の拡散バーナを組み合わせることで、総合で
１：２０から８０の繊維マットバーナ単独では得られな
い高いターンダウン比が達成できる。5. A diffusion burner was installed inside the upstream end of the combustion means. The turndown ratio, which is the ratio of the minimum output to the maximum output in the combustion means formed by the mat using the ceramic fiber, is usually about 1: 2, and the turndown ratio when using the metal fiber is about 1: 7. Is. When the gas to be heated contains sufficient oxygen, this burner has a turndown ratio of about 1:10 and a diffusion output burner with a lower output than the above fiber mat burner is combined. A high turndown ratio that cannot be obtained with the mat burner alone can be achieved.
【００２７】[0027]
【実施例】図１は本発明の空気加熱装置の一実施例の断
面図である。本発明の空気加熱装置は、被加熱気体であ
る空気がＤ方向に流れるダクト１７の途中に配置された
円筒状繊維マット７を本体とする燃焼手段３０と、この
燃焼手段の上流側端部内側に設けられて拡散バーナ２０
とから構成されている。繊維マット７は、例えばＳＵＳ
３１６の繊維の焼結マットである。1 is a sectional view of an embodiment of an air heating apparatus of the present invention. The air heating device of the present invention comprises a combustion means 30 having a cylindrical fiber mat 7 as a main body, which is arranged in the middle of a duct 17 in which air to be heated flows in a D direction, and an inside of an upstream side end portion of the combustion means. Installed in the diffusion burner 20
It consists of and. The fiber mat 7 is, for example, SUS
Sintered mat of 316 fibers.
【００２８】円筒状繊維マット７は、その両端部をダク
ト１７に形成された円筒状の取付け部材６ａ，６ｂによ
り挾持されて、固定されている。そして、円筒状繊維マ
ット７の外側を、円筒型の邪魔板３が取り囲み、更にそ
の外側を円筒型の外殻２が取り囲む形になっている。The cylindrical fiber mat 7 is clamped and fixed at both ends by cylindrical mounting members 6a and 6b formed in the duct 17. The outer surface of the cylindrical fiber mat 7 is surrounded by a cylindrical baffle plate 3, and the outer surface thereof is surrounded by a cylindrical outer shell 2.
【００２９】この場合、外側の取付け部材６ｂの軸方向
の内側端は半径方向外側に折曲げられ、一方邪魔板３の
外側端３ａは半径方向内側に折曲げられている。そし
て、外殻２に接続された配管１から予混合ガスＢが、燃
焼手段３０に送給されるようになっている。この際、予
混合ガスＢは外殻２と邪魔板３との間の空間を流れ、邪
魔板の折曲外側端３ａと、取付け部材６ｂの外側に折曲
げ部の間で方向転換しつつ取付け部材６ｂを冷却するよ
うになっている。こうして、繊維マット７の取付け部の
冷却部４が形成されている。In this case, the axially inner end of the outer mounting member 6b is bent outward in the radial direction, while the outer end 3a of the baffle plate 3 is bent inward in the radial direction. Then, the premixed gas B is fed to the combustion means 30 from the pipe 1 connected to the outer shell 2. At this time, the premixed gas B flows in the space between the outer shell 2 and the baffle plate 3 and is mounted on the outer side of the bent plate 3a of the baffle plate and on the outside of the mounting member 6b while changing the direction between the bent parts. The member 6b is designed to be cooled. In this way, the cooling part 4 of the attachment part of the fiber mat 7 is formed.
【００３０】拡散バーナ２０は、燃焼手段３０の補助と
して用いられるもので、その出力は燃焼手段３０に比べ
て小さくなっている。拡散バーナ２０は、バーナーチッ
プ１０と、それを覆うスナウト１１とから構成され、ス
ナウト１１とバーナーチップ１０との間に旋回羽根１２
がリング状に設置され、またスナウト１１の外側にもう
一つ別の旋回羽根１３が同様にリング状に設置されてい
る。The diffusion burner 20 is used as an auxiliary to the combustion means 30, and its output is smaller than that of the combustion means 30. The diffusion burner 20 includes a burner tip 10 and a snout 11 that covers the burner tip 10. The swirl vane 12 is provided between the snout 11 and the burner tip 10.
Is installed in a ring shape, and another swirl vane 13 is also installed in a ring shape on the outside of the snout 11.
【００３１】拡散バーナ２０への燃料ガスＡの供給は、
配管９による。配管９はバーナーチップ１０の被加熱気
体上流端に接続されている。バーナの点火装置１４、火
炎検知装置１５が、バーナーチップ１０から噴射される
燃料ガスＡの火炎に接するように配置されている。The supply of the fuel gas A to the diffusion burner 20 is
By pipe 9. The pipe 9 is connected to the heated gas upstream end of the burner tip 10. The burner ignition device 14 and the flame detection device 15 are arranged so as to come into contact with the flame of the fuel gas A injected from the burner tip 10.
【００３２】被加熱気体の流れの中に、リング状の風よ
け５が旋回羽根１３の外側に、円筒状繊維マット７の上
流端に張り出す形で取付けられている。また、燃焼手段
３０の被加熱気体下流側に絞り部材８が設置されてい
る。A ring-shaped windshield 5 is attached to the outside of the swirl vanes 13 in the flow of the heated gas so as to project to the upstream end of the cylindrical fiber mat 7. Further, the throttle member 8 is installed on the downstream side of the heated gas in the combustion means 30.
【００３３】次に、作用について説明する。配管１から
供給された予混合ガスＢは、外殻２と邪魔板３の間を通
り、円筒状繊維マット７の両端の取付け部材６ｂで構成
される冷却部４部に供給され、取付け部材６ｂを冷却す
ると同時に、予混合ガスＢは予熱される。Next, the operation will be described. The premixed gas B supplied from the pipe 1 passes between the outer shell 2 and the baffle plate 3 and is supplied to the cooling section 4 part composed of the mounting members 6b at both ends of the cylindrical fiber mat 7, and the mounting member 6b. At the same time as cooling, the premixed gas B is preheated.
【００３４】予熱された予混合ガスＢは、邪魔板３と繊
維マット７の間に流れ込み静圧で繊維マット７の隙間を
通して燃焼面である円筒内側に達する。このとき、予混
合ガスＢが燃焼し、繊維マット７の表面上で燃焼を完結
した後、被加熱気体中に高温の燃焼ガスとして噴出す
る。The preheated premixed gas B flows between the baffle plate 3 and the fiber mat 7 and reaches the inside of the cylinder, which is the combustion surface, through the gap between the fiber mats 7 under static pressure. At this time, the premixed gas B burns, completes the burning on the surface of the fiber mat 7, and then is ejected as high-temperature combustion gas into the heated gas.
【００３５】繊維マット７は、その表面上で高密度で、
予混合ガスを燃焼できるので、バーナを高出力とするこ
とができる。実施例の、ＳＵＳ３１６の金属繊維の焼結
マットバーナにおいては、マットの単位面積当りの負荷
が最大で１００kcal／cm2 Ｈにもなり、マットの燃焼面
積が１８００cm2 （円筒型マットの直径２５cm、軸方向
長さ２３cm）とすると、１８００００kcal／Ｈ（約２１
０kw）という高出力が得られる。The fiber mat 7 has a high density on its surface,
Since the premixed gas can be burned, the burner can have a high output. In the SUS316 metal fiber sintered mat burner of the example, the maximum load per unit area of the mat was 100 kcal / cm 2 H, and the mat burning area was 1800 cm 2 (diameter of the cylindrical mat was 25 cm, Assuming the axial length of 23 cm, 180,000 kcal / H (about 21
High output of 0kw) can be obtained.
【００３６】一方、最低面負荷は１５kcal／cm2 Ｈ以
下、最低出力は約３１kwで、ターンダウン比は約１：７
である。燃焼によって発生した熱は、赤熱した繊維マッ
ト７の円筒内側表面より対流熱伝達と高温の燃焼ガスの
拡散により、被加熱気体へ供給される。On the other hand, the minimum surface load is 15 kcal / cm 2 H or less, the minimum output is about 31 kw, and the turndown ratio is about 1: 7.
Is. The heat generated by the combustion is supplied to the heated gas from the inner surface of the cylinder of the fiber mat 7 which is red-heated by convective heat transfer and diffusion of high-temperature combustion gas.
【００３７】高温の燃焼ガスは絞り部材８により配管の
中心軸方向へ誘導され、被加熱気体との混合が促進され
る。こうして、被加熱気体は加熱が完了し、加熱装置か
ら下流のプロセス機器へ流出する。The high-temperature combustion gas is guided by the throttle member 8 in the direction of the central axis of the pipe to promote mixing with the gas to be heated. In this way, the heated gas is completely heated and flows out from the heating device to the downstream process equipment.
【００３８】一方、配管９より供給された燃料ガスＡ
は、バーナーチップ１０の先端より噴射される。被加熱
気体の一部が、スナウト１１とバーナーチップ１０の間
を通り、旋回羽根１２により円筒の軸を中心とした旋回
流となり、バーナーチップ１０の先端から噴出する燃料
ガスＡと混合する。この混合ガスが燃焼し、拡散炎を形
成する。On the other hand, the fuel gas A supplied from the pipe 9
Is ejected from the tip of the burner tip 10. A part of the gas to be heated passes between the snout 11 and the burner tip 10, becomes a swirl flow centered on the axis of the cylinder by the swirl vanes 12, and mixes with the fuel gas A ejected from the tip of the burner tip 10. This mixed gas burns to form a diffusion flame.
【００３９】この際、旋回羽根１２による旋回流とスナ
ウト１１のため、拡散炎は高速の被加熱気体によって失
火しにくくなっている。実施例における拡散バーナ２０
の出力は最大３５kw、最小３kw以下である。そして、燃
焼手段である繊維マットバーナとの組合わせにより、最
大２４５kw、最小３kwとなり、高ターンタウン比１：８
０以上を達成している。At this time, due to the swirling flow of the swirl vanes 12 and the snout 11, the diffusion flame is less likely to be misfired by the heated gas at a high speed. Diffusion burner 20 in the embodiment
The maximum output is 35 kw and the minimum is 3 kw or less. And by combining with the fiber mat burner which is a combustion means, the maximum is 245kw and the minimum is 3kw, and the high turn town ratio is 1: 8.
Achieved 0 or more.
【００４０】拡散炎の点火は点火装置１４で行われ、失
火および点火の検知は火炎検知装置１５で行われる。実
施例においては、拡散バーナ２０が繊維マットバーナの
袖火も兼ねており、繊維マットバーナの点火と保炎の機
能も果たしている。The ignition of the diffusion flame is performed by the ignition device 14, and the detection of misfire and ignition is performed by the flame detection device 15. In the embodiment, the diffusion burner 20 also functions as sleeve fire for the fiber mat burner, and also functions as ignition and flame holding of the fiber mat burner.
【００４１】スナウト１１の外側を流れる被加熱気体
は、旋回羽根１３により円筒の軸を中心とした旋回流と
なり、繊維マットバーナに導入される。この旋回流は、
繊維マット７からの燃焼ガスと被加熱気体の混合と、繊
維マットの内側表面での対流熱伝達を促進する。風よけ
５は、被加熱気体上流側での被加熱気体の流速を緩め、
繊維マットバーナの保炎の作用をする。The heated gas flowing outside the snout 11 becomes a swirl flow around the axis of the cylinder by the swirl vanes 13 and is introduced into the fiber mat burner. This swirling flow is
It promotes mixing of the combustion gas from the fiber mat 7 with the heated gas and convective heat transfer on the inner surface of the fiber mat. The windshield 5 slows down the flow velocity of the heated gas on the upstream side of the heated gas,
It acts as a flame stabilizer for the fiber mat burner.
【００４２】[0042]
【発明の効果】以上のように、この発明によれば、被加
熱気体の加熱装置を繊維焼結マットにより配管又はダク
トの形状に合わせて筒状に形成され、内側表面を燃焼面
とする燃焼手段として構成したので、加熱装置が高出力
で小型になる効果がある。As described above, according to the present invention, the heating device for the gas to be heated is formed by the fiber sintering mat into a tubular shape in accordance with the shape of the pipe or duct, and the inner surface serves as the combustion surface. Since it is configured as a means, there is an effect that the heating device has a high output and a small size.
【図１】本発明の気体加熱装置の一実施例の断面図。FIG. 1 is a sectional view of an embodiment of a gas heating apparatus of the present invention.
【図２】図１のIIーII矢視断面図。FIG. 2 is a sectional view taken along the line II-II in FIG.
【図３】図１のIII ーIII 矢視断面図。FIG. 3 is a sectional view taken along the line III-III in FIG.
【図４】従来の加熱装置の説明図。FIG. 4 is an explanatory view of a conventional heating device.
５…風よけ部材，７…繊維焼結マット，８…絞り部材、
２０…拡散バーナ、３０…燃焼手段。5 ... Wind shield member, 7 ... Fiber sintered mat, 8 ... Drawing member,
20 ... diffusion burner, 30 ... combustion means.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大野 陽太郎 東京都千代田区丸の内一丁目１番２号 日本鋼管株式会社内 (56)参考文献 特開 昭55−63311（ＪＰ，Ａ) 特開 平６−159630（ＪＰ，Ａ) 特開 平６−235508（ＪＰ，Ａ) 特開 昭56−94112（ＪＰ，Ａ) 実開 昭51−76043（ＪＰ，Ｕ) 実開 昭61−135134（ＪＰ，Ｕ) 実開 平５−61619（ＪＰ，Ｕ) 特表 平８−500425（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F23D 14/02 - 14/18 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yotaro Ohno 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (56) Reference JP-A-55-63311 (JP, A) JP-A-6 -159630 (JP, A) JP-A-6-235508 (JP, A) JP-A-56-94112 (JP, A) Actually opened 51-76043 (JP, U) Actually opened 61-135134 (JP, U) ) Actual Kaihei 5-61619 (JP, U) Tokuheihei 8-500425 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) F23D 14/02-14/18
Claims (6)
クトと、 前記配管又はダクト内に配置された 、繊維焼結マットに
より配管又はダクト形状に合わせて筒状に形成され、内
側表面を燃焼面とする燃焼手段と、前記燃焼手段の上流側端部において前記配管又はダクト
内に配置され、被加熱気体の流れに沿って下流に向けて
燃料ガスを噴射する拡散バーナとを備える ことを特徴と
する気体加熱装置。1. A piping or ducts for supplying a flow of heated gas, wherein disposed in the pipe or duct, are formed on in accordance with the pipe or duct shaped tubular by fiber sintered mat, burning the inner surface a combustion means for the surface, the pipe or duct at an upstream end of said combustion unit
Is placed inside and goes downstream along the flow of the heated gas
A gas heating device comprising: a diffusion burner for injecting fuel gas .
る上流側端部に隣接する配管又はダクト内壁上に、前記
被加熱気体の流れが前記燃焼面に直接当たることを妨げ
る風よけ部材を設けたことを特徴とする請求項１に記載
の気体加熱装置。2. A windshield that prevents the flow of the heated gas from directly impinging on the combustion surface on the inner wall of the pipe or duct adjacent to the upstream end that is the heated gas inflow side to the combustion means. The gas heating device according to claim 1, wherein a member is provided.
ある下流側端部に隣接する配管又はダクト内に、この配
管又はダクトの通過断面積を部分的に減少させる絞り部
材を設けたことを特徴とする請求項２に記載の気体加熱
装置。3. A throttle member for partially reducing a passage cross-sectional area of the pipe or duct is provided in the pipe or duct adjacent to the downstream end which is the heated gas outflow side from the combustion means. The gas heating device according to claim 2, wherein:
取付け部材の外周面に沿って、予混合ガスを供給する経
路を設けたことを特徴とする請求項３に記載の気体加熱
装置。4. The gas heating device according to claim 3, wherein a path for supplying a premixed gas is provided along the outer peripheral surface of the fiber sintered mat attachment member at both ends of the combustion means.
された、被加熱気体の流れを旋回流にして燃料ガスと混
合するための旋回羽根をさらに備えることを特徴とする
請求項１に記載の気体加熱装置。 5. A ring-shaped arrangement around the diffusion burner.
The heated gas flow is swirled and mixed with the fuel gas.
Characterized by further comprising swirl vanes for mating
The gas heating device according to claim 1 .
配置された、被加熱気体の流れを旋回流にして繊維焼結
マットからの燃焼ガスと混合するための旋回羽根をさら
に備えることを特徴とする請求項５に記載の気体加熱装
置。 6. A ring shape is further provided around the swirl vane.
Fiber sinter that makes the swirling flow of the placed heated gas
Further swirl vanes for mixing with the combustion gases from the mat
The gas heating device according to claim 5, wherein
Place
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09685795A JP3404981B2 (en) | 1995-04-21 | 1995-04-21 | Gas heating device |
| US08/544,116 US5749720A (en) | 1995-04-21 | 1995-10-17 | Gas heating apparatus with dual burners |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09685795A JP3404981B2 (en) | 1995-04-21 | 1995-04-21 | Gas heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08291904A JPH08291904A (en) | 1996-11-05 |
| JP3404981B2 true JP3404981B2 (en) | 2003-05-12 |
Family
ID=14176149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09685795A Expired - Lifetime JP3404981B2 (en) | 1995-04-21 | 1995-04-21 | Gas heating device |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5749720A (en) |
| JP (1) | JP3404981B2 (en) |
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|---|---|---|---|---|
| US2918118A (en) * | 1954-08-30 | 1959-12-22 | Phillips Petroleum Co | Burner |
| US2957753A (en) * | 1958-11-05 | 1960-10-25 | American Cyanamid Co | Titanium dioxide from titanium tetrachloride |
| GB1463663A (en) * | 1973-03-28 | 1977-02-02 | Shell Int Research | Porous media burner |
| GB1317168A (en) * | 1970-07-13 | 1973-05-16 | Shell Int Research | Porous media burner |
| US3840344A (en) * | 1972-06-06 | 1974-10-08 | Chemothermic Ind Inc | Carbon black production |
| US5211552A (en) * | 1990-08-15 | 1993-05-18 | Alzeta Corporation | Adiabatic surface combustion with excess air |
| JP2774370B2 (en) * | 1990-09-14 | 1998-07-09 | 日本電信電話株式会社 | 3D display method |
| US5205731A (en) * | 1992-02-18 | 1993-04-27 | Battelle Memorial Institute | Nested-fiber gas burner |
| US5511970A (en) * | 1994-01-24 | 1996-04-30 | Hauck Manufacturing Company | Combination burner with primary and secondary fuel injection |
| US5510093A (en) * | 1994-07-25 | 1996-04-23 | Alzeta Corporation | Combustive destruction of halogenated compounds |
-
1995
- 1995-04-21 JP JP09685795A patent/JP3404981B2/en not_active Expired - Lifetime
- 1995-10-17 US US08/544,116 patent/US5749720A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US5749720A (en) | 1998-05-12 |
| JPH08291904A (en) | 1996-11-05 |
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